public void SetFormula(int srcIndex, int trgIndex, IBxFormula fml)
{
if (srcIndex == trgIndex)
{
return;
}
BxSrcUnitFormulas formulas = _formulas[srcIndex];
formulas.SetFormula(trgIndex, fml);
}
public void SetFormula(string srcUnit, string trgUnit, IBxFormula fml)
{
if (srcUnit == trgUnit)
{
return;
}
IBxIndexedUnit src = ParseEx(srcUnit);
IBxIndexedUnit trg = ParseEx(trgUnit);
if ((src == null) || (trg == null))
{
return;
}
BxSrcUnitFormulas formulas = _formulas[src.Index];
formulas.SetFormula(trg.Index, fml);
}
public IBxFormula GetFormula(int srcIndex, int trgIndex)
{
if (srcIndex == trgIndex)
{
return(ParsedFormula.s_sameUnitFormula);
}
BxSrcUnitFormulas formulas = _formulas[srcIndex];
IBxFormula fml = formulas.GetFormula(trgIndex);
if (fml == null)
{
//取反向的转换关系
ParsedFormula tempFml = _formulas[trgIndex].GetFormula(srcIndex) as ParsedFormula;
if (tempFml != null)
{
fml = ParsedFormula.Inverse(tempFml);
formulas.SetFormula(trgIndex, fml);
}
}
if (fml == null)
{
if ((trgIndex == _nDefaultUnitIndex) || (srcIndex == _nDefaultUnitIndex))
{
throw new Exception(string.Format("缺乏单位{0}和主单位{1}之间的转换关系\n", this[srcIndex].ID, this[trgIndex].ID));
}
else
{
IBxFormula fml1 = GetFormula(srcIndex, _nDefaultUnitIndex);
IBxFormula fml2 = GetFormula(_nDefaultUnitIndex, trgIndex);
fml = new CombinedFormula(fml1, fml2);
formulas.SetFormula(trgIndex, fml);
}
}
return(fml);
}
public void LoadUnitConfigNode(XmlElement cateNode)
{
FormulaParser parser = new FormulaParser();
try
{
_id = cateNode.GetAttribute("id");
_code = cateNode.GetAttribute("code");
XmlElement unitsNode = (XmlElement)cateNode.SelectSingleNode("Units");
XmlNodeList unitsNodeList = cateNode.SelectSingleNode("Units").ChildNodes;
int count = unitsNodeList.Count;
_units = new CategoryUnits(count);
_formulas = new BxSrcUnitFormulas[count];
int nIndex = 0;
string id = null;
string code = null;
int dd = 0;
foreach (XmlElement one in unitsNodeList)
{
id = one.GetAttribute("id");
code = one.GetAttribute("code");
if (!Int32.TryParse(one.GetAttribute("decimalDigits"), NumberStyles.Any, CultureInfo.InvariantCulture, out dd))
{
//throw new Exception("no decimal digis in unit " + id + " !");
}
_units[nIndex] = new BxUnit(id, code, dd, this, nIndex);
_formulas[nIndex] = new BxSrcUnitFormulas(nIndex, count);
nIndex++;
}
}
catch (System.Exception) { }
string srcUnit;
string trgUnit;
try
{
XmlElement formulasNode = (XmlElement)cateNode.SelectSingleNode("Formulas");
if (formulasNode == null)
{
return;
}
string primaryUnitID = formulasNode.GetAttribute("primaryUnit");
if (string.IsNullOrEmpty(primaryUnitID))
{
return;
}
_nDefaultUnitIndex = ParseEx(primaryUnitID).Index;
XmlNodeList formulaNodeList = formulasNode.ChildNodes;
foreach (XmlElement one in formulaNodeList)
{
srcUnit = one.GetAttribute("src");
trgUnit = one.GetAttribute("trg");
parser.Formula = one.GetAttribute("convertion");
parser.Variant = srcUnit;
SetFormula(srcUnit, trgUnit, new ParsedFormula(parser.Parse()));
}
}
catch (System.Exception) { }
}